usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS

Currently when gadget enumerates in super speed plus, the isoc
endpoint request buffer size is not calculated correctly. Fix
this by checking the gadget speed against USB_SPEED_SUPER_PLUS
and update the request buffer size.

Fixes: 90c4d05 ("usb: fix various gadgets null ptr deref on 10gbps cabling.")
Cc: stable <[email protected]>
Signed-off-by: Pavankumar Kondeti <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Pavankumar Kondeti

drivers/usb/gadget/function/f_sourcesink.c

@@ -584,6 +584,7 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
 
 	if (is_iso) {
 		switch (speed) {
+		case USB_SPEED_SUPER_PLUS:
 		case USB_SPEED_SUPER:
 			size = ss->isoc_maxpacket *
 					(ss->isoc_mult + 1) *